Upstream migratory movements of American eel (Anguilla rostrata) between the Beauhornois and Moses-Saunders power dams on the St. Lawrence River
Bibliographic record
Abstract
The Beauharnois Generating Station, west of Montreal, is the first barrier encountered by the American eel during their upstream migration in the St. Lawrence River. The next power dam, Moses-Saunders, near Cornwall (Ontario)/Massena (New York), is located 80 km upstream. To study eel movements, 3,980 eels were marked with PIT tags in 1998 and released upstream (1,546) and downstream (2,434) of the Beauharnois Dam. In 1998 and 1999, 353 and 146 tagged eels, respectively, were recaptured at Beauharnois. In 1998, the movement of eels released downstream from the generating station was rather limited, since a great proportion (329/353 or 93%) of eels recaptured in the tailrace had been released at this site. However, results from 1999 indicate extensive interannual movements of a limited number of eels. At Moses-Saunders, in 1998 and 1999, 23 and 71 tagged eels, respectively, from Beauharnois were detected; most of these were released in the Beauharnois Canal. The time between release and recapture in 1998 indicates that the average migration speed during summer was approximately 1 km per day, although some eels can travel at a speed of 2.3 km per day. It is believed that most migrating juvenile eels would not have enough time to cross both dams in less than three seasons. A comparison of approximately 20 years of count data from the eel ladder at the Moses-Saunders Power Dam and lock usage in the St. Lawrence Seaway suggests that decreasing lockages are associated with the decreased number of eels at the ladder. Lastly, a change in eel commercial harvest between the two dams might have had an impact on yellow eel movements between the two sites.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".